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Concatenation of the previous pair of numbers, with the first two terms both 1.
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%I #19 Dec 18 2012 10:47:43

%S 1,1,11,111,11111,11111111,1111111111111,111111111111111111111,

%T 1111111111111111111111111111111111,

%U 1111111111111111111111111111111111111111111111111111111,11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

%N Concatenation of the previous pair of numbers, with the first two terms both 1.

%C The Fibonacci numbers, A000045, represented in base 1 (see A000042).

%F a(n) = (10^A000045(n)-1)/9.

%F a(n) = A000042(A000045(n)).

%e The third term is 11 which is the concatenation of the first two terms 1 and 1.

%Y Column b=1 of A214326.

%Y Column k=1 of A214679.

%Y Cf. A037842, A131293.

%K nonn,easy,base

%O 1,3

%A _Parthasarathy Nambi_, Jun 01 2005

%E Edited by _Jason Kimberley_, Dec 15 2012